Fig. 2. Characterization of PDA–MB. (A) TEM image of PDA–MB. Scale bar, 100 nm. (B) DLS analysis of hydrodynamic diameter and zeta-potential of PDA–MB prepared with different ratios of MB and PDA. PDA: 100 μg mL−1. MB: 0, 5, 10, 15, and 20 μg mL−1. (C) UV-vis absorption spectra of PDA, PDA–MB, and MB. (D) Time-dependent release of MB from PDA–MB upon addition of GSH. PDA–MB: 100 μg mL−1. GSH: 0, 0.02, 1, 2, and 10 mM.
